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Date:      Sat, 6 Jun 2020 13:22:12 +0200
From:      Gordon Bergling <gbergling@gmail.com>
To:        Mark Murray <markm@FreeBSD.org>
Cc:        Ian Lepore <ian@FreeBSD.org>, freebsd-hackers@freebsd.org
Subject:   Re: Cross compile FreeBSD on amd64 for arm64 failes via compile determination error
Message-ID:  <38CBC7EF-426B-45EE-9506-17B62F1F60FD@gmail.com>
In-Reply-To: <B9800A33-0F6C-407B-8F7A-F565945D627D@FreeBSD.org>
References:  <20200605183002.GA2973@lion.0xfce3.net> <2e91deb9835aaaadd6dceec95395b81f5257f15b.camel@freebsd.org> <B9800A33-0F6C-407B-8F7A-F565945D627D@FreeBSD.org>

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Hi Mark,

> Am 06.06.2020 um 11:56 schrieb Mark Murray <markm@FreeBSD.org>:
>=20
>=20
>> On 6 Jun 2020, at 00:25, Ian Lepore <ian@FreeBSD.org> wrote:
>>=20
>> You cannot do that.  The installworld process uses a path that points
>> into the obj tree that got built (so that new binaries are used to do
>> the install work), and those binaries are compiled for the arch that
>> did the build.
>=20
> That is my experience.
>=20
> I used to work around a closely related problem when I built build* on
> a fast machine, and did the install* on the slow ones. As I was using
> automounts, I ended up with incompatible paths baked into the build,
> so I worked around those with symlinks.
>=20
> I never tried this with anything other than i386/i386 or amd64/amd64,
> so the above is interesting. Could a viable cross-build* be "fixed" by
> symlinks, and somehow and easily forcing a cross-build of the =
bootstrap
> tools?
>=20
> My RPis wish to know :-)
>=20
> M
> =E2=80=94

In theory it should be possible to export the root filesystem of the =
RPIs and do a=20

make installworld -DNOROOT DESTDIR=3D/exported/root/rpi-1

or something like this on the fast machine.

But for now I have started the build on the raspberry pi directly to =
stress test
it a bit. :)

-- Gordon





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